Patent application number | Description | Published |
20080276689 | KNOCKING DETECTING DEVICE FOR AN INTERNAL COMBUSTION ENGINE - The present invention relates to a knocking detecting device for an internal combustion engine, for controlling a timing at which an ignition coil is actuated according to a knocking occurrence intensity, the knocking detecting device including the signal processing module for processing a signal attributable to knocking occurring in the operation of the internal combustion engine to determine a knocking occurrence intensity, in which the signal processing module includes: signal detecting means for detecting a signal attributable to knocking; frequency intensity calculating means for selecting a plurality of frequencies extracted from an output of the signal detecting means to calculate a frequency intensity; and knocking intensity determining means for finally determining that knocking occurs in a case where it is determined that at least two primary determination results of among a plurality of primary knocking determination results based on the outputs of the frequency intensity calculating means. | 11-13-2008 |
20090084353 | INTERNAL-COMBUSTION-ENGINE COMBUSTION CONDITION DETECTION APPARATUS - An internal-combustion-engine combustion condition detection apparatus that can accurately comprehend a combustion condition is obtained. The internal-combustion-engine combustion condition detection apparatus includes an ion-current detection device ( | 04-02-2009 |
20090099722 | INTERNAL-COMBUSTION-ENGINE IGNITION DIAGNOSIS APPARATUS AND INTERNAL-COMBUSTION-ENGINE CONTROL APPARATUS - The internal-combustion-engine ignition diagnosis apparatus is configured in such a way that the first duration setting unit sets the first detection duration in a predetermined duration including a time instant when the spark discharge is generated, the second duration setting unit sets the second detection duration after the first detection duration, the diagnosis unit determines normality of the spark discharge, based on a signal state in the second detection duration, and regardless of the signal state in the second detection duration, determines abnormality of the spark discharge, based on a signal state in the first detection duration. | 04-16-2009 |
20090108846 | COMBUSTION STATE DETECTION APPARATUS AND COMBUSTION STATE DETECTION METHOD FOR INTERNAL COMBUSTION ENGINE - A combustion state detection apparatus for an internal combustion engine, includes convexity detection means ( | 04-30-2009 |
20090173315 | INTERNAL-COMBUSTION-ENGINE COMBUSTION CONDITION DETECTION APPARATUS AND COMBUSTION CONDITION DETECTION METHOD - An internal-combustion-engine combustion condition detection apparatus is provided with an ignition means that makes an ignition plug ignite a fuel; an ignition control means that controls the operation of the ignition means; an ion-current detection means that detects an ion current generated; an ion current detection range setting means that sets an ion-current detection range; a preignition detection means that detects preignition within a detection range to be set; a leakage current detection range setting means that sets a leakage-current detection range; and a leakage current determination means that determines whether or not a smolder exists, based on a current detected, within a detection range to be set, by the ion-current detection means. The ignition control means includes a non-combustion-stroke ignition control means; the leakage-current detection range set by the leakage current detection range setting means is set within the non-combustion stroke. | 07-09-2009 |
20100101313 | COMBUSTION STATE DETECTING APPARATUS FOR INTERNAL COMBUSTION ENGINE - A combustion state detecting apparatus for an internal combustion engine includes: an ignition plug ( | 04-29-2010 |
20100122689 | COMBUSTION STATE DETECTION APPARATUS FOR INTERNAL COMBUSTION ENGINE - Disclosed is a combustion state detection apparatus for an internal combustion engine, which is capable of detecting abnormal combustion with high accuracy. The combustion state detection apparatus for an internal combustion engine includes: a variety of sensors; an ignition coil; an ignition plug; a transistor; a switching control unit; an ion current detection unit; and abnormal combustion detection units for determining that abnormal combustion has occurred in a case where a crank angle at a point of time when the ion current exceeds a predetermined current value or when the ion current that exceeds the predetermined current value reaches a peak value thereof is on a spark-advance side compared with a crank angle for determining abnormal combustion. The switching control unit ends the spark discharge at a predetermined timing while the spark discharge is in progress after the primary current is shut off and the spark discharge is generated. | 05-20-2010 |
20100186715 | ION CURRENT DETECTOR - The ion current detector includes: an ion bias circuit for supplying a bias voltage to an electrode of the ignition plug so as to cause the ignition plug to generate a spark discharge; and an ion current detection circuit for detecting an ion current generated in a combustion chamber by the spark discharge and for amplifying the detected ion current to output an ion current detection signal. The ion current detection circuit amplifies the ion current at an ion current amplification factor switched between a time when an ignition signal is supplied and a time when the ignition signal is not supplied. Specifically, when the ignition signal is supplied, the ion current amplification factor is set to a low value (approximately 50). When the ignition signal is not supplied, the ion current amplification factor is set to a high value (250 or more). | 07-29-2010 |
20100257921 | INTERNAL-COMBUSTION-ENGINE IGNITION DIAGNOSIS APPARATUS - There is provided an ignition diagnosis apparatus that detects ignition abnormality in a multi-point-ignition internal combustion engine. An ion detection device provided in at least one of a plurality of ignition devices detects an electric quantity based on ions produced in a combustion chamber due to combustion of an inflammable fuel-air mixture; an ion occurring timing detection device detects an ion occurring timing, based on the electric quantity detected in a predetermined detection period; an ignition abnormality determination device compares the detected ion occurring timing with a comparison timing set in such a way as to be delayed in terms of the rotation angle of a crankshaft of the internal combustion engine with respect to an ignition timing set for the ignition device provided with the ion detection device, and determines that ignition performed by the ignition device provided with the ion detection device is abnormal, in the case where the ion occurring timing is delayed in terms of the rotation angle of the crankshaft with respect to the comparison timing. | 10-14-2010 |
20100258081 | INTERNAL-COMBUSTION-ENGINE COMBUSTION STATE DETECTING APPARATUS - There is provided a combustion state detecting apparatus capable of detecting combustion-state abnormality in an internal combustion engine. A comparison timing is set to be advanced in terms of the rotation angle of the crankshaft of an internal combustion engine with respect to the ending timing of an electric quantity based on an ion that occurs when ignition is performed normally through a predetermined ignition signal among the plurality of ignition signals; in the case where, as a result of the comparison between the detected ending timing of an electric quantity based on an ion and the comparison timing, the ending timing is advanced in terms of the rotation angle of the crankshaft with respect to the comparison timing, it is determined that the combustion based on ignition through the predetermined ignition signal is abnormal. | 10-14-2010 |
20110088646 | COMBUSTION STATE DETECTION DEVICE FOR INTERNAL COMBUSTION ENGINE - A combustion state detection device for an internal combustion engine includes: an ignition control unit that controls activation of a primary winding for ignition; a comparison value setting unit that sets a comparison value with respect to an ion signal; and a combustion state discrimination unit that determines the occurrence of misfire depending on the magnitude of the ion signal with respect to the comparison value; wherein the ignition control unit, after generating a spark, reactivates the primary winding at least one time during one combustion stroke so that an induction voltage similar to that generated in the secondary winding at around a time when the primary winding begins to be activated for the purpose of starting combustion is generated in the secondary winding. | 04-21-2011 |
20110203358 | INTERNAL COMBUSTION ENGINE COMBUSTION STATE DETECTION APPARATUS - A combustion state detection apparatus includes an ion detection device that detects ions generated in a combustion chamber, an end detection device that detects ion signal end timing after spark timing obtained from the ion detection device, and a combustion diagnosis device that sets comparative timing to be compared with the end timing to determine abnormal combustion when the end timing is advanced from the comparative timing. The diagnosis device sets a smoothed value smoothed using various ion signal end timing values to set a ratio of the smoothed value and the spark timing and sets the comparative timing by making the ratio variable at predetermined timing with respect to the smoothed value. Hence, abnormal combustion in the internal combustion engine can be detected without causing a change in detection accuracy even with a change in calibration or environment and matching man hours for abnormal combustion detection can be reduced. | 08-25-2011 |
20110247598 | INTERNAL COMBUSTION ENGINE IGNITION CONTROLLING APPARATUS HAVING IGNITION DIAGNOSING FUNCTION - An ignition controlling apparatus is provided that can diagnose a state of spark discharge in an internal combustion engine, and perform appropriate actions based on the diagnostic results. | 10-13-2011 |
20120073362 | FAILURE DIAGNOSIS SYSTEM - Provided is a failure diagnosis system which can diagnose whether or not a sensitivity adjustment part is in failure. The failure diagnosis system includes: a plurality of sensors; various sensors that detect operating conditions of a device; a plurality of sensitivity adjustment parts that adjust receiver sensitivities of sensor signals from the plurality of sensors based on the detected operating conditions; and a failure diagnosis part that diagnoses whether or not the plurality of sensitivity adjustment parts are in failure. The failure diagnosis part detects a failure condition of a sensitivity adjustment part when a difference between a comparison value calculated based on a maximum value of the adjusted sensor signals from the plurality of sensitivity adjustment parts at a given interval, and a maximum value of the adjusted sensor signal from the sensitivity adjustment part to be diagnosed at the given interval is larger than a given amount. | 03-29-2012 |
20120286791 | ION CURRENT DETECTOR - In order not to deteriorate the detection properties of an ion current that monitors a combustion state even when a smolder leak is present in an ignition plug of an internal combustion engine, an ion current detector includes an ignition plug of an internal combustion engine, an ignition coil which supplies a high voltage to the ignition plug, a controller which sends an ignition command, a bias capacitor which supplies a bias voltage to the ignition coil, an ignition capacitor which is connected to a primary side winding of the ignition coil, a DC power supply which charges the ignition capacitor and the bias capacitor, a current detecting unit which detects a current flowing through the ignition plug, an ion current detecting unit which detects an ion current from the current detected by the current detecting unit, and a Zener diode which restricts a charging voltage of the bias capacitor. | 11-15-2012 |
20120293088 | IGNITION APPARATUS - An ignition apparatus includes: sparking coil supplying a sparking plug with a high voltage; an energy supply device supplying the sparking coil with energy; a first switch disposed therebetween; and a control device controlling the first switch's conduction. The energy supply device has a DC power supply, a resonance coil connected to the DC power supply, a sparking capacitor connected to the resonance coil, and a second switch disposed between the sparking capacitor and an earth, and charges the sparking capacitor to have a voltage value larger than that of the DC power supply in absolute value by making the resonance coil and the sparking capacitor generate an LC resonance when the second and first switches are turned ON and OFF, respectively, according to an instruction from the control device whereas supplying the sparking coil with energy when the second and first switches are operated inversely according to another instruction. | 11-22-2012 |
20130092136 | IGNITION CONTROL APPARATUS - Ignition is performed in such a way that a bias voltage is applied to a first electrode of an ignition plug and a current detection device detects a current that flows in the first electrode, that based on the value of the detected current, a smolder level detection device detects the level of a smolder produced in the ignition plug, and that a control device controls, based on the detected smolder level, at least one of the timing of ignition, the number of ignition events per power stroke of an internal combustion engine, and the amount of energy accumulated in an ignition coil device. | 04-18-2013 |
20130093342 | IGNITION APPARATUS - When the first switch is on, the ignition capacitor is charged up to a voltage value whose absolute value is larger than an output voltage value of a DC power source, through resonance caused by a resonance coil and the ignition capacitor; when the second switch is on, the ignition capacitor supplies energy to the ignition coil device, and when the second switch is off, the energy is released and a high voltage is applied across electrodes of an ignition plug. | 04-18-2013 |
20130263834 | IGNITION DEVICE AND IGNITION METHOD FOR INTERNAL COMBUSTION ENGINE - The ignition device for the internal combustion engine includes: an ignition plug including a first electrode and a second electrode opposed to each other via a predetermined gap, for generating in the predetermined gap a spark discharge for igniting a combustible mixture in a combustion chamber of the internal combustion engine; an ignition coil including a primary coil and a secondary coil, for generating a high voltage in the secondary coil by supplying or stopping a primary current flowing through the primary coil, and then applying the generated high voltage to the first electrode; and a control unit for driving the ignition coil for a plurality of times within a single ignition process, and changing a primary voltage for driving the ignition coil within the single ignition process. | 10-10-2013 |
20140261346 | IGNITION APPARATUS - An ignition apparatus includes a spark plug having a high voltage electrode and an external electrode facing each other across a gap and being configured to generate a spark discharge in the gap to ignite a combustible fuel mixture in a combustion chamber of an internal combustion engine, an ignition coil device configured to generate a predetermined high voltage and supply the high voltage to the high voltage electrode to form a path for the spark discharge in the gap, a high frequency power supply having a band-pass filter and being configured to supply an alternating current to the spark discharge path, and a control device configured to control operation timing of the high frequency power supply. The band-pass filter passes a frequency of from 1 MHz to 4 MHz. | 09-18-2014 |
20140306617 | HIGH-FREQUENCY DISCHARGE IGNITION COIL APPARATUS AND HIGH-FREQUENCY DISCHARGE IGNITION APPARATUS - Provided is a compact ignition coil apparatus that can realize reliable insulation breakdown and spark discharge with high discharge current. A high-frequency discharge ignition coil apparatus includes: a capacitor | 10-16-2014 |